How to return windows?

I initially had windows and ubuntu, but then I was need to reinstall ubuntu, and when I marked the disc, I don't remember how deleted the partition by 500 MB, which contained some files windows. Now I have a partition with ubuntu and windows partition files, but when you start the computer no longer receive the operating system selection. I again booted with windows?
April 19th 20 at 12:02
2 answers
April 19th 20 at 12:04
You should restore the Windows boot loader, but not as usual, but in a more advanced variant, see here (second method):
April 19th 20 at 12:06
Do as said above. After that, will default to boot Windows. If you need another Ubuntu, it will be necessary to restore and its loader. To do this, boot into live, to make chroot to put its loader to update its configuration.
Or, if the firmware at the moment, there is a boot entry for Ubuntu and it is loaded even without the first partition of 500 MB, after you repair the Windows boot loader will be sufficient to update the configuration of the Linux loader and put it in the priority of loading.

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